Defensive publication

ABSTRACT

IMPROVE SILVER HALIDE COMPOSITIONS ARE DISCLOSED WHICH CAN BE REVERSAL-PROCESSED IN FOGGING DEVELOPERS SUCH AS DISCLOSED IN U.S. PATENTS 2,563,785 BY IVES AND 2,497,875 BY FALLESON. GOOD REVERSAL IMAGES CAN BE OBTAINED WITH INTERNAL-IMAGE SILVER HALIDE EMULSIONS EVEN IF THEY HAVE SOME SURFACE SENSITIVITY. IN ONE EMBODIMENT, THE IMPROVED SILVER HALIDE EMULSIONS DISCLOSED HEREIN COMPRISE AN INTERNAL-IMAGE SILVER HALIDE EMULSION COMPRISING A MEROCARBOCYANINE DYE AND A SULFONATED DERIVATIVE OF A POLYNUCLEAR CARBOCYCLIC AND/OR A COMPOUND OF THE FORMULA:   WHEREIN R1 IS AN ALKYL OR ARYL GROUP CONTAINING 1 TO ABOUT 12 CARBON ATOM, R2 IS AN ALKYL GROUP OF 1 TO ABOUT 12 CARBON ATOMS, R IS AN ALKYLENE GROUP HAVING FROM 1 TO ABOUT 6 CARBON ATOMS AND PREFERABLY IS A METHYLENE GROUP, X IS AN ANION, A IS A SULFUR ATOM OR A SULFONE GROUP, AND R3 AND R4 ARE ALKYL GROUPS FO FROM 1 TO ABOUT 8 CARBON ATOMS OR THEY ARE TOGETHER THE NECESSARY ATOMS TO FORM A HETEROCYCLIC GROUP WHICH IS PREFERABLY A MONOCYCLIC GROUP HAVING FROM 5 TO 7 ATOMS IN THE RING. IN ANOTHER EMBODIMENT, A SILVER HALIDE EMULSION WHICH HAS BEEN SULFUR- AND GOLD-SENSITIZED CAN BE BATHED IN AN ALKYLENEBIS BENZOTHIAZOLIUM SALT AFTER EXPOSURE, FOLLOWED BY DEVELOPING IN A STRONGLY ALKALINE SOLUTION CONTAINING AN ACTIVE DEVELOPING AGENT TO PRODUCE A REVERSAL IMAGE. IN STILL ANOTHER EMBODIMENT, A SPECTRALLY SENSITIZED SILVER HALIDE EMULSION HAVING SOME SURFACE SENSITIVITY AND CONTAINING AN AMINOALKYL-SUBSTITUTED PIPERAZINE CAN BE PROCESSED IN A DEVELOPER ACCORDING TO IVES, U.S. PATENT 2,563,7858 TO OBTAIN A REVERSAL IMAGE.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 O.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

Published March 16, 1971 T884,013 SILVER HALIDE REVERSAL COMPOSITIONSNorman Wayne Kalenda, Eastman Kodak (10., Kodak Park Division,Rochester, N.Y. 14650 Filed Apr. 23,1970, Ser. No. 31,384 Int. Cl. G03c1/08 US. Cl. 96-102 No Drawing. 17 Pages Specification Improved silverhalide compositions are disclosed which can be reversal-processed infogging developers such as disclosed in US. Patents 2,563,785 by Ivesand 2,497,875 by Falleson. Good reversal images can be obtained withinternal-image silver halide emulsions even if they have some surfacesensitivity. In one embodiment, the improved silver halide emulsionsdisclosed herein comprise an internal-image silver halide emulsioncomprising a merocarbocyanine dye and a sulfonated derivative of apolynuclear carbocyclic and/ or a compound of the formula:

3 1li-R wherein R is an alkyl or aryl group containing 1 to about 12carbon atom, R is an alkyl group of 1 to about 12 carbon atoms, R is analkylene group having from 1 to about 6 carbon atoms and preferably is amethylene group, X is an anion, A is a sulfur atom or a sulfone group,and R and R are alkyl groups of from 1 to about 8 carbon atoms or theyare together the necessary atoms to form a heterocyclic group which ispreferably a monocyclic group having from 5 to 7 atoms in the ring. Inanother embodiment, a silver halide emulsion which has been sulfurandgold-sensitized can be bathed in an alkylenebis benzothiazolium saltafter exposure, followed by developing in a strongly alkaline solutioncontaining an active developing agent to produce a reversal image. Instill another embodiment, a spectrally sensitized silver halide emulsionhaving some surface sensitivity and containing an aminoalkyl-substitutedpiperazine can be processed in a developer according to Ives, US. Patent2,563,- 785, to obtain a reversal image.

